What is the minimum operating experience required for a flight engineer on turbojet aircraft with common carriage?

The minimum operating experience required for a flight engineer on turbojet aircraft with common carriage is 12 hours of supervised initial operating experience. This requirement is established to ensure that flight engineers gain adequate hands-on experience in operating turbojet aircraft under supervision before they are allowed to operate these aircraft independently. This supervised time is crucial for them to become familiar with the aircraft's systems, procedures, and emergency protocols.

The supervised experience provides an opportunity for the flight engineer to learn directly from experienced personnel, helping to assess their competency effectively. Having a structured amount of supervised operating experience ensures that they have practical knowledge and skills necessary for safe operations in various flight scenarios, which is particularly important given the complexities associated with turbojet engines and common carrier responsibilities.

The other options lack the necessary specifics in terms of flight engineer training standards as outlined by aviation regulatory authorities, demonstrating that they do not meet the regulatory framework established for such positions.